Santa Rosa police have arrested a Walnut Creek man on suspicion of robbing $11,000 worth of marijuana Tuesday during a drug deal in a gas station parking lot. Jai Glenn East, 28, was arrested in Vallejo late Thursday afternoon for robbery, Sgt. Steve Fraga said. Fraga said four men in a sport utility vehicle with white rims robbed 3 pounds of high-grade marijuana from the victim in a gas station parking lot near the Coddingtown Mall around 5:45 p.m. Tuesday. East, the primary suspect in the planned marijuana deal that ended in robbery, was armed with a semi-automatic pistol, Fraga said. He was booked into the Sonoma County jail.